Fig. 3 - Safety Shutdown Contacts; Fig. 4 - Run Contacts; Fig. 5 - Anticipatory/Alarm Contacts - York MILLENNIUM YT J Wiring Diagram

FIG. 3 – SAFETY SHUTDOWN CONTACTS
FIG. 3 – SAFETY SHUTDOWN CONTACTS
When closed, these contacts signify the unit is not per-
mitted to start due to a SAFETY shutdown condition.
Safety shutdowns require a manual reset procedure be
performed before the unit can be restarted. YORK
Operating and Maintenance Manual 160.55-O1 provides
a list and explanation of all Safety shutdowns. While
these contacts are closed, the Graphic Control Center
will display "Safety Shutdown – Manual Restart" on
the System Status Bar and the cause of the shutdown
on the System Details Bar of the display. These con-
tacts will remain closed until the safety condition no
longer exists and a manual reset is performed by plac-
ing the Graphic Control Center COMPRESSOR Switch
in the Stop-Reset position (O). The unit can then be
restarted. Safety Shutdown contacts function in all op-
erating modes.
YORK INTERNATIONAL
LD04385
FIG. 4 – RUN CONTACTS
FIG. 4 – RUN CONTACTS
When closed, these contacts signify that the unit is op-
erating. The Graphic Control Center will display a Sys-
tem Run Message.
FIG. 5 – ANTICIPATORY/ALARM CONTACTS
FIG. 5 – ANTICIPATORY/ALARM CONTACTS
These contacts will close whenever one or more of the
following WARNING conditions occurs. They will re-
main closed as long as the condition is in effect. On
most Warnings, the contacts automatically open when
the condition is no longer present. On those warnings
marked with an asterisk, the contacts will open only
after the condition is no longer present and the WARN-
ING RESET key is pressed in Operator (or higher) ac-
cess level.
Real time Clock failure, Condenser or Evaporator Trans-
ducer Error*, Purge – High Pressure*, Purge – Float
Switch Error*, Excess Purge*, Vanes Uncalibrated,
External I/O – Serial Communications, Setpoint Over-
ride*, Condenser-High Pressure Limit, Evaporator-Low
Pressure Limit, Vanes Uncalibrated – Fixed speed, Har-
monic filter – Operation Inhibited, Harmonic Filter –
Data Loss, Harmonic Filter – Input Frequency Out of
Range.
FORM 160.55-PW7
LD04386
LD04604
5